Both the Yolk Sac and Allantois of a Developing Chick

question 206

Multiple Choice

Both the yolk sac and allantois of a developing chick

• A) are formed by mesoderm and endoderm.
• B) have cells that digest yolk.
• C) function in the exchange of respiratory gases.
• D) are formed by ectoderm and endoderm.
• E) store metabolic wastes.

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Definitions:

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